Jeff Rowlands Amp and Dac vs. VAC amp and DAC


Hello, I am new to this forum but I have a question. I am trying to pair an amp + DAC with my Wilson Sabrinas. I have listened to Jeff Rowlands integrated with the Aeris DAC. And the VAC Sigma integrated with the Aeris DAC. Price is a factor and so is space. Does the 625 need a pre-amp? Any suggestions or thoughts? 
rinpoche
P. S. I am Canadian. We all dive right into the water/deep end. The water is way too cold to wade in slowly. LOL

Rinpoche,

You've tested out the waters pretty well.   Not much else to do now but enjoy.

Rinpoche,
Absolutely logical explanation and response. It isn’t "always" necessary to take baby steps. Your Wilson and Rowland system have you perched at a pretty high level in the realm of High End Audio . Finding a highly regarded cable (that’s needed to complete your system connection ) for a very attractive price makes nothing but good sense. The Mogambi suggestion was made in part to satisfy my selfish curiosity. You have good ears and I would have been interested in your listening comparison.
Charles,